From the look of it, there aren't many desktop applications that support Open Office Documents:
Applications_supporting_OpenDocuments
I hesitate to say there is nothing out there because someone always proves me wrong, but nothing obvious to me.
I was going to suggest planmaker, but I doubt it. (The thread above suggests the desktop version of softmaker's word process supports the WP version of Open Documents, but nothing mentioned about spreadsheets).
Good Luck . . .